Collapsible tiee core



C. L. SMITH AND E. S.-WEBSTER'.

COLLAPSIBLE TIRE CORE.

APPLICATION HLED JULY 15. 1920.

1,434,567; Patented Nov. 7, 1922.

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COLLAPSIBLE TIRE CORE.

APPLICATION FILED JULY 15, 1920.

1,434,567. Patented Nov. 7, 1922.

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Patented Nov. 7, 1922.

UNITED STATES PATENT orrlcs.

CLYDE L. SMITH AND EMMETT S. WEBSTER,DF SOUTH BEND, INDIANA, ASSIGNORS, BY MESNE ASSIGNMENTS, TO SMITH ONE HEAT SYSTEM, OF SOUTH BEND, INDIANA,

A CORPORATION OF INDIANA.

COLLAPSIBLE TIRE CORE.

Continuation of application Serial No. 286,117, filed. March 29, 1919.

1920. Serial No. 396,624.

To all whom it may concern:

Be it known that .WG GLYDE L. SMITH and EMMETT S. WEBSTER, citizens of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana,-have invented certain new and useful Improvements in Collapsible Tire Cores, of which the. following is a specification.

The invention relates to a core usable in the manufacture of pneumatic tire casings or shoes, and serves as a forming means upon which the casing is bullt up, as 1s well understood in the art,and which invention was originally disclosed in an application by us filed on March 29, 1919, Serial No. 286,117.

The object of the present improvement resides in the provision of a sectional core constructed in a manner to permit a part of the sections to be disassembled piecemeal, and a part mechanically operative in unison by a single operation, whereby thecoremay be readily and quickly collapsed to permit the easy removal of the casing, and as readily and quickly restored to its operative form, all with the view of effecting a saving of time and labor as compared with the like factors involved in the use of sectional cores, of which the partsmust all be separately assembled and locked together by the employment of a considerable number of fastening devices, which require a corresponding use of time and labor in the application and removal thereof.

With the above and other objects in view, the invention in the preferred form of details will be described in the following specification, reference being had particularlyto the accompanying drawings, in which- Figure 1 is a top view of the improved core and its cooperating parts.

Figure 2 .is a side elevation of the core proper. v

Figure 3 is a cross sectional view taken on the line 3-3 of Fig. 2.

Figure 4 is a sideelevation of the core, with parts of the core sections removed and the remaining sections moved to collapsed or inoperative position This application filed July 15,

a number 'of like detachable core sections employed.

In the drawings above briefly described,

the numeral 1 designates the core proper,

which may be made of any suitable material, as wood or metal, and comprises detachable sections 2, and collapsible sections 3, all of which, when in operative relation, forming a ring upon which the tire casing is built up in a manner well understood in the art.

The reference 4 designates a tubular bracket, which may be supported by a retative arm 5, whereby the bracket may be swung in a vertical plane to permit the core carried thereby to be swung to either a vertical or horizontal position, as may be most convenient for the workman in applying the material in the building up of the casing. Extending within the tubular bracket for both telescopic and rotative movement with relation thereto is a spindle 6, formed with an annular head 7 at its outer end, corresponding with a similar head Sintegrally formed on the outer end of the bracket. The said heads '7 and 8, as well as the inwardly disposed flanges 9 of the collapsible sections 3 of the core, are provided with complementary apertured lugs 10 relatively arranged in radial alined pairs with respect to the axis of the core. Toggle links 11 are hingedly connected at their outer ends with the lugs of the core sections 3, and their inner, ends likewise connected at their inner ends with the respective bracket and spindle heads in alternate order, whereby a like number of the toggle links will oppose each other in the toggle movement that will obtain byla telescopic movement of the spindle. The links 11 are preferably provided with forked heads 12 adapted to straddle the lugs 10, and

a hinged connection effected therebetween by pivot pins or bolts 13 passed through alined apertures in said parts.

The meeting ends of the collapsible and being parti.

removable sections are provided respectively with tongues let and grooves l5, adapted to interengage to prevent lateral misalinement between the sections. The sections 2 are also provided. with endwise extending channel members l6 adapted toi it over the adjoining flange ends of the collapsible sections, and also serving to prevent lateral relative misalinement between the sections. Each of the detachable sections 2 is provided with hook 17, adapted for engagement with an eye 18 on the bracket head 8, which serve to hold the said sections against inward movement under endwise pressure exerted against the same by the collapsible sections in drawing the parts into operative relation, and wl ch also afford a simple means permitting the quick removal of the detachable sections prelim nary to moving the collapsible sections to inoperative position, as illustrated in screw bolt 20 is threaded in the inner end of the bracket 4:, which is adapted to abut the inner end of the spindle 6, and by means of which great pressure may be ap plied endwise of the spindle to draw the core sections into firm engagement, the bolt being formed to provide a crank hande 21 to pernnt rapid manipulation thereof. A similarly formed screw bolt 22 is threaded in the bracket transverse thereof and adapted for loc mg the spindle against rotative movement.

It will be apparent from the foregoing description that, by slightly retracting the screw bolts 20 and 22, a slight inward movement imparted to the spindle will release the core sections from a binding engagement, whereupon the detachable core sections 2, by releasing the hooks 17, may be readily withdrawn by an inward and outward'movement thereof, the flexibility of the tire cas ing at its open marginal edges permitting the sections to be withdrawn sidewise after ly withdrawn inwardly without injuriousl distorting the casing, so that complete withdrawal o't'the sections will not be interfered with by the proximate toggle links, as so might appear. After removal .of the detachable core sections, an outward pull on the handle 23 carried by the spindle will cause the collapsible sections to be drawn inwardly, shown in Figs. e and 5, so that the tire casing may be easily removed therefrom. it will be apparent that, with the core sections reassembled and endwise pressure applied to the end of the spindle by the screw bolt 22, that said sections will be drawn tightly together at their ends and secnrely held in their proper operative rela-- tion.

While the foregoing is the preferred form. of the invention, we desire it to be understood we do not limit ourselves to the pre cise structure shown and described, as it is obvious that the same may be variously modified without departing from the spirit of the invention.

Having thus described our invention, what is claimed is l. A tire core comprising a series of sections in ring form when. assembled, means for supporting and simultaneously moving a part of the sections toward and from a common axis, and detachable sections adapted to be clamped between the movable sections by a contractive movement of the latter.

2. A tire core comprising a series of sections in ring form when assembled, means for supporting and simultaneously moving a part of the sections toward and from a common axis, detachable sections adapted to be clamped between said movable sections by a contractive movement of the latter, and means for holding the detachable sections against inward movement under the influence of such contractive movement.

A tire core comprising a series of sec tions in ring form when assembled, a bracket, a spindle telescopically supported by the bracket, toggle links hingedly connected with a part or said sections and with one end of the bracket and spindle, and bodily detachable sections adapted to be clamped between the link connected sections by a movement of the spindle.

4. A tire core comprising a series of sections in ring form when assembled, a bracket, a spindle rotatively and telescopically supported by the bracket, toggle links hingedly connected with a part of said sections and with one end of the bracket and spindle, bodily detachable sections adapted to be clamped between the link connected sections by a movement of the spindle, and means for supporting the detachable sections against inward movement under the said clamping action.

A tire core comprising a series of sections in ring form when assembled, a bracket, a spindle telescopically supported by the bracket, toggle links hingedly connected with a part of the sections and with the bracket and spindle, and means for applying endwise pressure to the spindle.

6. A tire core comprising a series of sections in ring form when assembled, a bracket, a spindle telescopically supported by the bracket, toggle links hingedly connected with a part of thesections and with one end of the bracket and spindle, and a pressure screw threaded in the other end of the bracket and adapted to bear against the like end of the spindle.

7. A tire core comprising a series of sections in ring form when assembled, a bracket, a spindle rotatively and telescopically mounted therein, toggle links hingedly connec'ted with a part of the sections and with one end of the bracket and spindle, means for applying endwise pressure to the spindle, and means for locking the spindle against rotation.

8. A tire core comprising a series of sections in ring form when assembled, a brack et, a spindle telescopically carried by the bracket, toggle operated sections having link connections with one end of the bracket and spindle, detachable sections cooperating with the toggle operated sections, means for holding the detachable sections at a given radius with respect to the axis of the bracket and spindle, and means forming an interlocking engagement between the section ends to'prevent relative misalinement thereof.

In testimony whereof we afiix our signatures.

CLYDE L. SMITH.

EMMETT S. WEBSTER. 

